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Working principle of slow wire processing

 Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette

Introduction to the method of evaluating the quality of lubricating oil

  The three major tests for evaluating the quality of lubricants are more critical. As a standard for comprehensively evaluating lubricant quality, countries around the world have basically become consistent, establishing a quality standard consisting of four parts: physical and chemical indicators of lubricants, simulation tests, bench tests, and driving tests. system.

The physical and chemical indicators are the basis. The physical and chemical indicators used to measure the basic performance of lubricants include: kinematic viscosity, low temperature dynamic viscosity, viscosity index, flash point, pour point, sediment, moisture, foam, residual carbon, neutralization value, sulfate ash content And the content of various elements and so on.These physical and chemical indicators are only the basic indicators for measuring lubricating oil. If even the physical and chemical indicators are unqualified, then the following simulation tests and bench tests will not be able to talk about.

The simulation test is the evaluation method. The first is the simulation test. During the research and development of the oil product, the technicians found that the physical and chemical indicators of the oil product cannot explain the problem or reflect whether the mechanical friction pair is easy to use. The main test It consists of the following parts: the coking plate test method and heat pipe test method reflecting the cleanness, dispersion and anti-oxidation of automotive lubricants; the multi-metal oxidation test method and film oxidation test method reflecting the oxidation resistance of automotive lubricants at high temperatures; reflection The speckle test method for the ability of automotive lubricants to disperse sludge; the high-temperature four-ball machine abrasion test method reflecting the anti-wear level of automotive lubricants. These simulation tests can only simply reflect the working conditions of the engine, and cannot simulate the influence of the engine on the performance of the oil, especially under the complex conditions and working conditions. In addition, the simulation test method generally adopts comparatively intensified or generalized test conditions. However, the strengthening will be unrealistic, because in the whole process of the engine operation, various comprehensive factors are combined, which affect the oil’s anti-oxidation, cleaning, dispersion and anti-wear capabilities. It is impossible to perform the simulation test of a single performance evaluation. The method is truthfully measured and evaluated, so the various simulation test methods and their evaluation indicators are basically not reflected in the engine oil specifications.

The bench test reflects the problem more truthfully. In order to truly reflect the use of oil, and at the same time, it can be recognized by the engine manufacturing department. A bench test to evaluate the performance of lubricating oil has been developed.The bench test is to install a representative engine in a test room, perform an evaluation test for a certain period of time under approved or recognized control conditions, and wait for the engine manufacturer to negotiate and determine various performance indicators before the test. After the rack test is completed, it will be judged; observe whether the testable oil product meets the requirements; if the oil product's various judgment indicators are within the limit range, it can be considered that the oil product has been initially approved and obtained the qualification of the type of oil product. certificate.In principle, it can supply the market.After the above three tests, the quality of the lubricating oil can be fully guaranteed to meet the engine oil requirements of various engine manufacturers.

The bench test is to install a representative engine in a test room, perform an evaluation test for a certain period of time under approved or recognized control conditions, and wait for the engine manufacturer to negotiate and determine various performance indicators before the test. After the rack test is completed, it will be judged; observe whether the testable oil product meets the requirements; if the oil product's various judgment indicators are within the limit range, it can be considered that the oil product has been initially approved and obtained the qualification of the type of oil product. certificate.In principle, it can supply the market.After the above three tests, the quality of the lubricating oil can be fully guaranteed to meet the engine oil requirements of various engine manufacturers.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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